15L7 solobaric cut out size?

What is the cutout size for a 15L7 grey cone?
Is It exactly 15????
Thanks.

RACING A HONDAS LIKE THE SPECIAL OLYMPICS
EVEN IF YOU WIN YOUR STILL RETARDED
FOR SALE/TRADE
1999 ford escort zx2 sport
needs a hood and driverside headlight
i already have fender just needs painted
pretty clean otherwise
has a cold air intake and short shifter
130 sum thousand miles 2.0 16 valve dohc 5 spd tranny
$1000 takes it book is 2500 how it sits
trades looking for a hearse or other big body car for my next lowrider project
90 or 91 talon or eclipse awd
hydraulic parts or a crotch rocket